Haha just go with the one you like the best. You don't need anything super fancy or hi tech I got the yellow one for the blooming bath because it was the one at the store the pink and cute colors are all online hahaha
I have the blooming bath it is like a giant flower and my little one is 2 weeks I bathed her last night and it was fairly easy and she was really comfortable I would suggest that or anything you can just set them in like a seat:)